Scania fault code 633
Code 633 is used by 8 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Injector, cylinder 7
Short-circuited to ground.
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BMU Battery Management Unit
Internal insulation fault in the propulsion battery
The electrical insulation between the negative terminal or the positive terminal and earth for the propulsion battery is too low, lower than 4 kohm.
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VDT
Internal fault
Implausible message via CAN.
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CUV Visibility system
Internal control unit, right-hand headlamp
Fault in the temperature sensor in the internal control unit in the right-hand headlamp.
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BCI
Information fault, brake pressure sensor
Faulty information regarding the brake pressure sensor.
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CMS
Implausible signal from remote control 2 for vehicle level
The signal from remote control 2 has been active for too long and is interpreted as implausible. The remote control is connected to the coordinator.
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EST
Switch for tag axle steering disengagement
The tag axle steering disengagement switch has been activated for an implausible amount of time.
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ESTA
Switch for tag axle steering disengagement
The tag axle steering disengagement switch has been activated for an implausible amount of time.
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